Internal and external heat dissipation type motor

Abstract

This invention relates to the field of energy-saving motor technology, specifically to an internally and externally heat-dissipating motor, comprising a housing, a shaft, multiple stator discs, and multiple rotor discs. The shaft is rotatably mounted on the housing, and multiple first oil groups and multiple second oil groups are sequentially arranged along its axial direction. Each first oil group includes multiple first oil passages, and each second oil group includes multiple second oil passages. The stator discs are mounted on the housing, and the rotor discs are mounted on the shaft. An adjusting element is provided between every two adjacent first and second oil passages along the shaft's axial direction. This adjusting element can adjust the amount of oil entering the first and second oil passages according to the shaft's rotational speed. In this internally and externally heat-dissipating motor, during operation, the adjusting element can adjust the oil distribution ratio in real time according to the shaft's rotational speed, changing the amount of oil entering the first and second oil passages to balance heat dissipation requirements and energy-saving goals under different operating conditions.

Description

Technical Field

[0001] This invention relates to the field of energy-saving motor technology, specifically to a motor with internal and external heat dissipation. Background Technology

[0002] Based on the direction of the magnetic flux path, motors can be divided into two types: radial flux motors and axial flux motors. Axial flux motors, also known as axial motors, refer to motors where the motor's rotation axis is parallel to the direction of the magnetic flux. Compared to radial flux motors, axial flux motors have advantages such as energy saving, environmental friendliness, lightweight design, high power density, and high torque density. They are considered high-efficiency energy-saving motors and have broad application prospects in many fields, including electric ships, new energy vehicles, electric aircraft, and robotics.

[0003] For high-efficiency and energy-saving motors like axial flux motors, heat dissipation performance is crucial for ensuring high power density output, long-term stable operation, and maximized energy efficiency. A good heat dissipation system not only prevents heat buildup inside the motor but also fully leverages the energy-saving potential of the motor, extending equipment lifespan. Currently, the mainstream cooling method for axial flux motors is oil cooling. This involves circulating cooling oil through the motor's hollow shaft. The centrifugal force generated by the motor's rotation propels the oil into the air gap between the rotor and stator, cooling the rotor and stator through heat exchange, thus maintaining normal motor operation.

[0004] However, in actual use, when the rotor drives the entire motor to rotate at low speed, the heat generated by the stator windings is relatively concentrated, while the rotor generates less heat, and existing cooling methods can produce good results. But when the rotor drives the entire motor to rotate at high speed, the heat mainly comes from changes in the magnetic field and friction. The rotor not only has to withstand frictional heat but also internal heat induced by the high-frequency magnetic field, which means that the rotor cannot be effectively cooled. Furthermore, when the shaft is rotating at high speed, if a large amount of cooling oil is still filling the air gap, it will cause a large amount of viscous resistance (oil churning loss) between the rotor surface and the stationary stator. This additional loss will directly consume the output power of the high-efficiency energy-saving motor and significantly reduce the motor's operating efficiency. Summary of the Invention

[0005] This invention provides an internal and external heat dissipation motor to solve the problem that existing motors cannot adjust the heat dissipation of the stator and rotor according to the speed, resulting in poor heat dissipation and affecting the motor's operating efficiency.

[0006] The present invention discloses an internally and externally heat-dissipating motor, which adopts the following technical solution: An internally and externally heat-dissipating motor includes a housing, a rotating shaft, multiple stator discs, and multiple rotor discs. The housing is provided with heat sinks and has an oil drain port. The rotating shaft is rotatably mounted on the housing and coaxial with it. The rotating shaft has a hollow structure and an oil inlet at one end. Multiple first oil groups and multiple second oil groups are sequentially arranged along the shaft's axial direction, and the first and second oil groups are alternately distributed along the shaft's axial direction. Each first oil group includes multiple first oil passages, and each second oil group includes multiple second oil passages. All first and second oil passages are evenly distributed around the shaft's axial direction and are connected to the rotating shaft. The multiple stator discs and multiple rotor discs are located between the rotating shaft and the housing and are connected to the rotating shaft. The stator disk is mounted on the housing, and the rotor disk is mounted on the rotating shaft. Multiple stator disks and multiple rotor disks are arranged sequentially and alternately along the axis of the rotating shaft inside the housing. An air gap is defined between adjacent stator disks and rotor disks, and the first oil passage is connected to the air gap. Each rotor disk has multiple third oil passages around its axis, and the third oil passages correspond one-to-one with the second oil passages, and the third oil passages are connected to their corresponding second oil passages. An adjusting element is provided between every two adjacent first and second oil passages along the axis of the rotating shaft. The adjusting element can adjust the amount of oil entering the first and second oil passages according to the rotational speed of the rotating shaft, so that the amount of oil entering the first oil passage is negatively correlated with the rotational speed of the rotating shaft, and the amount of oil entering the second oil passage is positively correlated with the rotational speed of the rotating shaft.

[0007] Furthermore, multiple adjusting cylinders are evenly distributed around the axis of the rotating shaft. The adjusting cylinders are arranged along the axis of the rotating shaft and are sealed to the rotating shaft. Multiple adjusting components in the same axial direction are installed in the same adjusting cylinder, and each adjusting cylinder has a through hole for connecting to the first oil passage and the second oil passage respectively. The adjusting component includes an adjusting plate and two stops. The two stops are arranged sequentially in the axis of the rotating shaft and are slidably installed in the first oil passage and the second oil passage respectively. The two stops are connected by a connecting rod. The adjusting plate is arranged in the radial direction of the rotating shaft and inserted between the two stops. The adjusting plate can move relative to the two stops in the radial direction of the rotating shaft and can move synchronously with the two stops in the axis of the rotating shaft.

[0008] Furthermore, each adjusting plate is provided with an adjusting shaft, and the adjusting cylinder is provided with multiple adjusting grooves. The adjusting grooves are inclined grooves and are provided one-to-one with the adjusting shafts. The adjusting shaft is slidably installed in the adjusting groove corresponding to it through the first elastic element. The two ends of the adjusting groove in the direction of the rotating shaft axis are respectively referred to as the first end and the second end. The first end is located on the side of the second end in the direction of the rotating shaft axis that is close to the first oil passage adjacent to it, and the first end is located on the side of the second end in the direction of rotational radial direction that is far away from the central axis of the rotating shaft. In the initial state, the first elastic element causes the adjusting shaft to move closer to the second end of the adjusting groove corresponding to it.

[0009] Furthermore, the two stops can move closer to or further away from each other along the axis of rotation.

[0010] Furthermore, the rotating shaft is provided with multiple mounting slots, which are arranged along the radial direction of the rotating shaft and correspond one-to-one with the adjustment slots. Limiting blocks are provided in the mounting slots, which can pass through the mounting slots along the radial direction of the rotating shaft and extend into the adjustment cylinder. The limiting blocks are locked to the rotating shaft by bolts.

[0011] Furthermore, the rotating shaft is provided with multiple first through holes and multiple second through holes. The first through holes are configured one-to-one with the first oil passages, and the first through holes are connected to the first oil passages corresponding to them. The second through holes are configured one-to-one with the second oil passages, and the second through holes are connected to the second oil passages corresponding to them.

[0012] Furthermore, each rotor disk is provided with multiple first baffles and multiple second baffles, which are respectively disposed on two end faces of the rotor disk in the direction of the rotating shaft axis. The multiple first baffles and multiple second baffles are arranged sequentially and alternately around the rotating shaft axis. The two ends of the first baffles and the second baffles in the direction of the rotating shaft axis are respectively referred to as the head end and the tail end. In the rotation direction of the rotor disk, the head end is located behind the tail end, and in the radial direction of the rotating shaft, the head end is located on the side of the tail end that is far away from the central axis of the rotating shaft in the radial direction of the rotating shaft. The first baffle and the second baffle both have a first state and a second state. In the first state, the first baffle and the second baffle both extend into the air gap. In the second state, the first baffle and the second baffle both retract into the rotor disk. In the initial state, the first baffle and the second baffle are both in the first state.

[0013] Furthermore, both the first baffle and the second baffle are inclined relative to the axis of rotation. An elastic block is provided on the rotor disk. The two end faces of the first baffle and the second baffle on the axis of rotation are respectively referred to as the first end face and the second end face. The first end face is located on the side of the first baffle or the second baffle that is close to the air gap, and the first end face is inclined. In the initial state, the first end face is in the air gap. The second end face is located on the side of the first baffle or the second baffle that is close to the elastic block, and the second end face abuts against the elastic block.

[0014] Furthermore, both the first and second baffles are provided with trigger holes, which are configured one-to-one with the third oil passages. Each trigger hole is located in the third oil passage corresponding to it. Each rotor disk has a trigger cylinder slidably installed in the third oil passage. The trigger cylinder is arranged along the radial direction of the rotating shaft, and the two ends of the trigger cylinder in the radial direction of the rotating shaft are connected. In the initial state, the trigger cylinder is located on the side of the first and second baffles in the radial direction of the rotating shaft, close to the central axis of the rotating shaft, and the trigger hole and the corresponding third oil passage are connected but not coaxial. When the first and second baffles are retracted into the rotor disk, and the trigger cylinder slides along the radial direction of the rotating shaft away from the central axis of the rotating shaft and passes through the trigger hole, the trigger hole and the corresponding third oil passage are connected and coaxial.

[0015] Furthermore, the trigger cylinder is a square cylinder with a sloping surface on its outer peripheral wall, located on the side of the trigger cylinder near the elastic block.

[0016] The beneficial effects of this invention are as follows: The internal and external heat dissipation motor of this invention, by setting up a housing, a rotating shaft, multiple stator discs and multiple rotor discs, allows the adjusting component to adjust the oil distribution ratio in real time according to the rotational speed of the rotating shaft during motor operation, changing the amount of oil entering the first oil circuit and the second oil circuit, so as to take into account the heat dissipation requirements and energy-saving goals under different working conditions. On this basis, the heat sink on the housing is used to help dissipate the heat inside the housing, forming an internal and external synergistic heat dissipation mode of precise internal dual oil circuit heat dissipation and external heat sink assisted heat dissipation. It can stably adapt to different speeds and load conditions, ensuring long-term stable operation of the motor. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of an internally and externally heat-dissipating motor according to the present invention; Figure 2 This is a front view of the overall structure of an embodiment of an internally and externally heat-dissipating motor according to the present invention; Figure 3 for Figure 2 A cross-sectional view along the AA direction; Figure 4 for Figure 3 Enlarged view of point B in the middle; Figure 5This is a diagram showing the state of the oil volume in the first and second oil circuits when the stop block moves to adjust the oil level in an embodiment of an internally and externally heated motor according to the present invention. Figure 6 for Figure 3 Enlarged view of point C in the middle; Figure 7 This is a diagram showing the state in which the first baffle of an embodiment of an internally and externally heat-dissipating motor of the present invention is retracted into the rotor disk. Figure 8 This is an exploded view of the overall structure of an embodiment of an internally and externally heat-dissipating motor according to the present invention; Figure 9 This is a schematic diagram of a partial structure of an embodiment of an internally and externally heat-dissipating motor according to the present invention; Figure 10 for Figure 9 The front view of the structure shown; Figure 11 for Figure 9 A split diagram of the structure shown; Figure 12 This is a schematic diagram of the structure of the adjusting component in an embodiment of an internal and external heat dissipation motor according to the present invention; Figure 13 This is a schematic diagram of the trigger cylinder of an embodiment of an internal and external heat dissipation motor according to the present invention.

[0019] In the diagram: 100, housing; 110, heat sink; 120, oil drain port; 130, sealing end cap; 200, rotating shaft; 210, bearing; 220, oil inlet; 230, oil inlet pipe; 240, first oil passage; 250, second oil passage; 260, adjusting cylinder; 261, adjusting groove; 270, limit block; 300, stator disc; 400, rotor disc; 410, third oil passage; 500, adjusting component; 510, adjusting plate; 511, adjusting shaft; 512, first elastic component; 520, stop block; 530, connecting rod; 600, first baffle; 610, elastic block; 620, trigger hole; 630, trigger cylinder; 631, oil hole; 632, ramp surface; 640, nut. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] An embodiment of the present invention, a motor with internal and external heat dissipation, is as follows: Figures 1 to 13 As shown.

[0022] An internally and externally heat-dissipating motor includes a housing 100, a rotating shaft 200, multiple stator discs 300, and multiple rotor discs 400. The housing 100 is equipped with heat sinks 110 and has an oil drain port 120 connected to it. An oil drain pipe is connected to the oil drain port 120. The rotating shaft 200 is rotatably mounted on the housing 100 via a bearing 210 and is coaxial with the housing 100. The rotating shaft 200 has a hollow structure and an oil inlet 220 at one end, with an oil inlet pipe 230 rotatably connected to it. The oil inlet pipe 230 is rotatably and sealingly connected to the rotating shaft 200. Multiple first oil groups and multiple second oil groups are sequentially arranged along the axial direction of the rotating shaft 200, and the first and second oil groups are alternately distributed along the axial direction of the rotating shaft 200. The first oil group includes multiple first oil passages 240, and the second oil group includes multiple second oil passages 250. All the first oil passages 240 and the multiple second oil passages 250 are evenly distributed around the axis of the rotating shaft 200, and all the first oil passages 240 and the multiple second oil passages 250 are connected to the rotating shaft 200. Specifically, the first oil group includes eight first oil passages 240, and the second oil group includes eight second oil passages 250.

[0023] Multiple stator disks 300 and multiple rotor disks 400 are located between the rotating shaft 200 and the housing 100, and are all coaxial with the rotating shaft 200. The stator disks 300 are fixedly mounted on the housing, and the rotor disks 400 are fixedly mounted on the rotating shaft 200. The multiple stator disks 300 and multiple rotor disks 400 are arranged sequentially within the housing 100 along the axis of the rotating shaft 200, and are alternately distributed sequentially along the axis of the rotating shaft 200. An air gap is defined between adjacent stator disks 300 and rotor disks 400, and the first oil passage 240 is connected to the air gap. Each rotor disk 400 has multiple third oil passages 410 arranged around its axis. The third oil passages 410 are arranged in a one-to-one correspondence with the second oil passages 250, and the third oil passages 410 and their corresponding second oil passages 250 are connected. An adjusting member 500 is provided between every two adjacent first oil passages 240 and second oil passages 250 along the axis of the rotating shaft 200. The adjusting member 500 can adjust the amount of oil entering the first oil passage 240 and the second oil passage 250 according to the rotational speed of the rotating shaft 200, and make the amount of oil entering the first oil passage 240 negatively correlated with the rotational speed of the rotating shaft 200, and the amount of oil entering the second oil passage 250 positively correlated with the rotational speed of the rotating shaft 200. That is, when the rotating shaft 200 speeds up, the amount of oil entering the first oil passage 240 decreases and the amount of oil entering the second oil passage 250 increases; when the rotational speed decreases, the amount of oil entering the first oil passage 240 increases and the amount of oil entering the second oil passage 250 decreases.

[0024] Similar to existing technologies, the stator disk 300 includes a stator base plate and winding coils, with the winding coils disposed on the stator base plate. The rotor disk 400 includes a rotor base plate and permanent magnets, with the permanent magnets disposed on the rotor base plate.

[0025] The housing 100 comprises two housings, which are bolted together, and a sealing end cap 130 is provided between the rotating shaft 200 and each of the two housings. The portion of the rotating shaft 200 inside the housing 100 has a stepped structure, and each rotor disk 400 is bolted to a step of the rotating shaft 200. The stepped structure of the rotating shaft 200 facilitates the installation and positioning of the rotor disks 400.

[0026] The rotating shaft 200 is provided with multiple first through holes and multiple second through holes. The first through holes are configured one-to-one with the first oil passages 240 and are connected to each other. The second through holes are configured one-to-one with the second oil passages 250 and are connected to each other. Thus, when cooling oil enters the rotating shaft 200 from the oil inlet 220, the cooling oil will flow from the first through hole to the first oil passage 240 and simultaneously flow from the second through hole to the second oil passage 250.

[0027] This embodiment comprises a housing 100, a rotating shaft 200, multiple stator disks 300, and multiple rotor disks 400. During operation, when the winding coils on the stator disks 300 are connected to an AC power source, a changing magnetic field is generated. This magnetic field interacts with the permanent magnets on the rotor disks 400, forming an axial rotating magnetic field at their interface. According to the law of electromagnetic induction, this rotating magnetic field drives the rotor disks 400 to rotate in the direction of the magnetic field, thereby outputting mechanical power and causing the rotating shaft 200 to rotate.

[0028] Simultaneously, cooling oil is introduced into the rotating shaft 200 through the oil inlet 220. The cooling oil then flows through the rotating shaft 200 into the first oil passage 240 and the second oil passage 250. When the rotating shaft 200 rotates at a low speed, the heat is mainly concentrated on the winding coils of the stator disk 300, while the rotor disk 400 generates less heat. At this time, the adjusting component 500 ensures that more oil enters the first oil passage 240 and less oil enters the second oil passage 250. That is, the amount of oil entering the first oil passage 240 is greater than the amount entering the second oil passage 250. This allows more cooling oil to be placed in the air gap between the stator disk 300 and the rotor disk 400, directly cooling the surfaces of the stator disk 300 and the rotor disk 400, ensuring a cooling effect. Furthermore, since the rotating shaft 200 rotates at a low speed at this time, the viscous resistance and oil churning loss between the rotor disk 400 and the stator disk 300 are also small, which will not affect the normal operation of the motor. As the rotational speed of the shaft 200 increases, the heat generated by the rotor disk 400 increases. At this time, the adjusting component 500 gradually reduces the amount of oil entering the first oil passage 240 and gradually increases the amount of oil entering the second oil passage 250. The cooling oil is introduced into the third oil passage 410 of the rotor disk 400 through the second oil passage 250, directly cooling the inside of the rotor disk 400. This can maintain the heat dissipation effect while the shaft 200 rotates at high speed, while reducing the viscous resistance and oil churning loss between the rotor disk 400 and the stator disk 300, thus weakening the impact on the motor operating efficiency.

[0029] During motor operation, the regulating component 500 can adjust the oil distribution ratio in real time according to the rotation speed of the shaft 200, changing the amount of oil entering the first oil circuit 240 and the second oil circuit 250 to take into account the heat dissipation requirements and energy-saving goals under different working conditions. On this basis, the heat sink 110 on the housing 100 is used to help dissipate the heat inside the housing 100, forming an internal and external synergistic heat dissipation mode of precise internal dual oil circuit heat dissipation and external heat sink 110 auxiliary heat dissipation. This mode can stably adapt to different speeds and load conditions, ensuring long-term stable operation of the motor.

[0030] In a further embodiment, a plurality of adjusting cylinders 260 are evenly distributed around the axis of the rotating shaft 200, and eight adjusting cylinders 260 are provided. The adjusting cylinders 260 are arranged along the axis of the rotating shaft 200 and are sealed to the rotating shaft 200. A plurality of adjusting components 500 in the same axial direction are installed in the same adjusting cylinder 260, and each adjusting cylinder 260 is provided with a through hole for connecting to the first oil passage 240 and the second oil passage 250 respectively. The adjusting component 500 includes an adjusting plate 510 and two stops 520. The two stops 520 are arranged sequentially in the axial direction of the rotating shaft 200 and are slidably installed in the first oil passage 240 and the second oil passage 250 respectively. The two stops 520 are connected by a connecting rod 530. The adjusting plate 510 is arranged along the radial direction of the rotating shaft 200 and inserted between the two stops 520. The adjusting plate 510 can move relative to the two stops 520 along the radial direction of the rotating shaft 200 and can move synchronously with the two stops 520 in the axial direction of the rotating shaft 200.

[0031] Each adjusting plate 510 is equipped with an adjusting shaft 511, and the adjusting cylinder 260 has multiple adjusting grooves 261. The adjusting grooves 261 are inclined grooves and are arranged one-to-one with the adjusting shafts 511. The adjusting shafts 511 are slidably installed in the corresponding adjusting grooves 261 by means of a first elastic element 512, which is a spring. The two ends of the adjusting grooves 261 in the axial direction of the rotating shaft 200 are respectively referred to as the first end and the second end. The first end is located on the side of the second end in the axial direction of the rotating shaft 200, close to the first oil passage 240 adjacent to it, and the first end is located on the side of the second end in the radial direction of rotation, away from the central axis of the rotating shaft 200. In the initial state, the first elastic element 512 causes the adjusting shaft 511 to move closer to the second end of the corresponding adjusting groove 261.

[0032] Furthermore, the two stops 520 can move closer to or further away from each other along the axis of the rotating shaft 200.

[0033] Specifically, the connecting rod 530 is configured as a spring telescopic rod, allowing it to extend and retract along the axis of the rotating shaft 200. In use, when the stop blocks 520 need to be installed inside the adjusting cylinder 260, the two stop blocks 520 are pinched together, bringing them closer together. Once inside the adjusting cylinder 260, they are released. Then, the adjusting plate 510 is inserted between the two stop blocks 520. Under the restriction of the adjusting plate 510, the two stop blocks 520 cannot continue to move closer or further apart along the axis of the rotating shaft 200, thus allowing them to move synchronously with the adjusting plate 510. Furthermore, due to the limited range of movement of the adjusting plate 510, it will not detach from the stop blocks 520. Alternatively, the stop block 520 can be slidably engaged with the connecting rod 530, and a spring can be installed between the connecting rod 530 and the stop block 520. When the stop block 520 needs to be installed in the adjusting cylinder 260, the two stop blocks 520 can be pinched by hand to bring them closer together, compressing the spring between the stop block 520 and the connecting rod 530. After placing it in the adjusting cylinder 260, the spring can be released, and then the adjusting plate 510 can be inserted between the two stop blocks 520.

[0034] Furthermore, the rotating shaft 200 is provided with multiple mounting slots, which are arranged radially along the rotating shaft 200 and correspond one-to-one with the adjusting slots 261. Limiting blocks 270 are installed within the mounting slots, allowing them to pass through the mounting slots radially along the rotating shaft 200 and extend into the adjusting cylinder 260. The limiting blocks 270 are locked to the rotating shaft 200 by bolts. By providing the limiting blocks 270 and extending them into the adjusting cylinder 260, the adjusting cylinder 260 can be limited, restricting its movement.

[0035] In use, when the rotational speed of the rotating shaft 200 is low, the centrifugal force on the adjusting plate 510 and the adjusting shaft 511 is relatively small. At this time, under the action of the first elastic element 512, the adjusting shaft 511 moves a small amount away from the central axis of the rotating shaft 200, and the movement of the adjusting shaft 511 will drive the adjusting plate 510 to move synchronously. Since the adjusting groove 261 is an inclined groove, while the adjusting shaft 511 moves away from the central axis of the rotating shaft 200, the adjusting shaft 511 will also move along the axis of the rotating shaft 200 towards the side closer to the first oil passage 240. The movement of the adjusting shaft 511 will drive the two stop blocks 520 to move synchronously through the adjusting plate 510, thereby increasing the obstruction of the stop blocks 520 on the first oil passage 240 and reducing the obstruction of the stop blocks 520 on the second oil passage 250. It should be noted that although the amount of oil entering the first oil passage 240 is relatively less, the amount of oil entering the first oil passage 240 is still greater than the amount of oil entering the second oil passage 250. This allows more cooling oil to be in the air gap between the stator disk 300 and the rotor disk 400, directly cooling the surfaces of the stator disk 300 and the rotor disk 400 and ensuring the cooling effect. As the rotational speed of the shaft 200 increases, the centrifugal force on the adjusting plate 510 and the adjusting shaft 511 also increases. The amount by which the adjusting shaft 511 moves away from the central axis of the shaft 200 gradually increases, which further increases the obstruction of the stop block 520 on the first oil passage 240 and reduces the obstruction of the stop block 520 on the second oil passage 250. This causes the amount of oil entering the first oil passage 240 to gradually decrease and the amount of oil entering the second oil passage 250 to gradually increase. Ultimately, the amount of oil entering the first oil passage 240 is less than the amount of oil entering the second oil passage 250. The cooling oil is then introduced into the third oil passage 410 of the rotor disk 400 through the second oil passage 250, directly cooling the inside of the rotor disk 400. This allows the shaft 200 to maintain heat dissipation at high speed while reducing the viscous resistance and oil churning loss between the rotor disk 400 and the stator disk 300, thus mitigating the impact on the motor's operating efficiency.

[0036] In another possible embodiment, each rotor disk 400 is provided with a plurality of first baffles 600 and a plurality of second baffles. The plurality of first baffles 600 and the plurality of second baffles are respectively disposed on two end faces of the rotor disk 400 in the direction of the axis of rotation of the shaft 200, and the plurality of first baffles 600 and the plurality of second baffles are arranged sequentially and alternately around the axis of rotation of the shaft 200. Specifically, there are four first baffles 600 and four second baffles. The two ends of the first baffles 600 and the second baffles in the direction of rotation of the shaft 200 are respectively referred to as the head end and the tail end. In the rotation direction of the rotor disk 400, the head end is located behind the tail end, and in the radial direction of the shaft 200, the head end is located on the side of the tail end away from the central axis of the shaft 200 in the radial direction of the shaft 200. The first baffle 600 and the second baffle both have a first state and a second state. When in the first state, both the first baffle 600 and the second baffle extend into the air gap. When in the second state, both the first baffle 600 and the second baffle retract into the rotor disk 400. In the initial state, both the first baffle 600 and the second baffle are in the first state.

[0037] That is, rotor disk 400 refers to Appendix Figure 10 The direction shown is counterclockwise. The direction closer to the arrow indicating counterclockwise rotation is called forward, and the direction further away from the arrow indicating counterclockwise rotation is called backward.

[0038] The first baffle 600 and the second baffle are both inclined relative to the axis of the rotating shaft 200. An elastic block 610 is provided on the rotor disk 400. The two end faces of the first baffle 600 and the second baffle on the axis of the rotating shaft 200 are respectively referred to as the first end face and the second end face. The first end face is located on the side of the first baffle 600 or the second baffle closer to the air gap, and the first end face is inclined. Initially, the first end face is in the air gap. The second end face is located on the side of the first baffle 600 or the second baffle closer to the elastic block 610, and the second end face abuts against the elastic block 610.

[0039] Both the first baffle 600 and the second baffle are provided with trigger holes 620, which are arranged one-to-one with the third oil passages 410. Each trigger hole 620 is located in its corresponding third oil passage 410. Each rotor disk 400 has a trigger cylinder 630 slidably arranged in the third oil passage 410. The trigger cylinder 630 is arranged along the radial direction of the rotating shaft 200, and its two ends in the radial direction of the rotating shaft 200 are connected. The trigger cylinder 630 has an oil hole 631 in the circumferential direction to facilitate the outflow of cooling oil. In the initial state, the trigger cylinder 630 is located on the side of the first baffle 600 and the second baffle close to the central axis of the rotating shaft 200 in the radial direction of the rotating shaft 200, and the trigger hole 620 and its corresponding third oil passage 410 are connected but not coaxial. When the first baffle 600 and the second baffle retract into the rotor disk 400, and the trigger cylinder 630 slides along the radial direction of the rotating shaft 200 to the side away from the central axis of the rotating shaft 200 and passes through the trigger hole 620, the trigger hole 620 and the corresponding third oil passage 410 are connected and coaxial.

[0040] In this embodiment, by setting a first baffle 600 and a second baffle, under normal circumstances, when the amount of cooling oil pumped into the rotating shaft 200 is moderate (achieving normal circulating cooling), since the trigger cylinder 630 is initially located on the side of the first baffle 600 and the second baffle close to the central axis of the rotating shaft 200 in the radial direction of the rotating shaft 200, when the rotation speed of the rotating shaft 200 is low, although the first baffle 600, the second baffle, and the trigger cylinder 630 are subjected to centrifugal force, the centrifugal force on the first baffle 600, the second baffle, and the trigger cylinder 630 is relatively small at this time. The first baffle 600 and the second baffle will remain in an extended state, and the trigger cylinder 630 will not pass through the trigger hole 620. Furthermore, because the head end is located behind the tail end in the rotation direction of the rotor disk 400, and in the radial direction of the rotating shaft 200, the head end is located on the side of the tail end away from the central axis of the rotating shaft 200 in the radial direction of the rotating shaft 200, thus making it possible for the rotating shaft 200 to rotate at a lower speed... Figure 10 When the direction shown is rotated counterclockwise, the flow rate of the cooling oil on the side of the first baffle 600 and the second baffle away from the central axis of the shaft 200 in the radial direction of the shaft 200 will be relatively faster, and a negative pressure will be generated to attract the cooling oil in the first oil passage 240. The negative pressure will assist the centrifugal force to perform suction, thereby enhancing the cooling effect.

[0041] As the rotational speed of the shaft 200 increases, the centrifugal force on the first baffle 600, the second baffle, and the trigger cylinder 630 will gradually increase. This causes the first baffle 600 and the second stop block 520 to retract into the rotor disk 400 under the action of centrifugal force, compressing the elastic block 610 and preventing the first baffle 600 and the second baffle from obstructing the high-speed rotation of the rotor disk 400 and the stator disk 300. At this time, the trigger cylinder 630 will also move radially away from the central axis of the shaft 200 and pass through the trigger hole 620 until the trigger hole 620 and the corresponding third oil passage 410 are coaxial. The trigger cylinder 630 limits the first baffle 600 and the second baffle.

[0042] In another operating condition, when the rotational speed of the shaft 200 is low and the amount of cooling oil pumped into the shaft 200 increases, the cooling oil can push the first baffle 600 and the second baffle back into the rotor disk 400, compressing the elastic block 610. This prevents the first baffle 600 and the second baffle from affecting the rotation of the stator disk 300 and the rotor disk 400 due to excessive oil volume, thus increasing oil churning losses. At this time, the trigger cylinder 630 can also move under the action of the cooling oil, limiting the movement of the first baffle 600 and the second baffle. When the rotational speed of the shaft 200 is high and the amount of cooling oil pumped into the shaft 200 increases, the first baffle 600 and the second baffle will retract into the rotor disk 400 under the combined action of the pushing force of the cooling oil and centrifugal force in the third oil circuit 410. This prevents the first baffle 600 and the second baffle from hindering the high-speed rotation of the rotor disk 400 and the stator disk 300 during high-speed rotation, thus preventing increased oil churning losses.

[0043] Furthermore, multiple nuts 640 are rotatably mounted on the outer peripheral wall of each rotor disk 400. Each nut 640 corresponds one-to-one with a third oil passage 410, and each nut 640 is located on the rotor disk 400 at its corresponding third oil passage 410. The nut 640 limits the maximum sliding distance of the trigger cylinder 630. By setting the nut 640, the trigger cylinder 630 is prevented from being thrown out of the third oil hole 631.

[0044] Furthermore, the trigger cylinder 630 is a square cylinder, and the outer peripheral wall of the trigger cylinder 630 has a sloping surface 632, which is located on the side of the trigger cylinder 630 near the elastic block 610.

[0045] By setting the ramp surface 632, the trigger cylinder 630 can pass through the trigger hole 620 more smoothly. As the rotational speed of the shaft 200 gradually decreases from high speed, the centrifugal force on the first baffle 600, the second baffle, and the trigger cylinder 630 also gradually decreases. The elastic block 610 will gradually reset and press the first baffle 600 and the second baffle in the opposite direction. This, in turn, presses the ramp surface 632 of the trigger cylinder 630 through the first baffle 600 and the second baffle, and pushes the trigger cylinder 630 along the radial direction of the shaft 200 towards the side closer to the central axis of the shaft 200, until the first baffle 600 and the second baffle extend into the air gap. Furthermore, setting the trigger cylinder 630 as a square cylinder prevents it from rotating in the third oil passage 410, allowing the ramp surface 632 to be pushed by the elastic block 610.

[0046] Based on the above embodiments, the specific working process is as follows: In operation, when the winding coils on the stator disk 300 are connected to an AC power source, a changing magnetic field is generated. This magnetic field interacts with the permanent magnets on the rotor disk 400, forming an axial rotating magnetic field at their interface. According to the law of electromagnetic induction, this rotating magnetic field drives the rotor disk 400 to rotate in the direction of the magnetic field, thereby outputting mechanical power and driving the shaft 200 to rotate.

[0047] Simultaneously, cooling oil is introduced into the rotating shaft 200 through the oil inlet 220, and the cooling oil will flow through the rotating shaft 200 into the first oil passage 240 and the second oil passage 250. When the rotating shaft 200 rotates at a low speed, the heat is mainly concentrated on the winding coils of the stator disk 300, and the rotor disk 400 generates less heat. The centrifugal force on the adjusting plate 510 and the adjusting shaft 511 is relatively small. At this time, under the action of the first elastic element 512, the adjusting shaft 511 moves a small amount away from the central axis of the rotating shaft 200, and the movement of the adjusting shaft 511 will drive the adjusting plate 510 to move synchronously. Because the adjusting groove 261 is an inclined groove, as the adjusting shaft 511 moves away from the central axis of the rotating shaft 200, it also moves along the axis of the rotating shaft 200 towards the first oil passage 240. This movement of the adjusting shaft 511 drives the two stop blocks 520 to move synchronously via the adjusting plate 510, thereby increasing the obstruction of the stop blocks 520 on the first oil passage 240 and decreasing the obstruction of the stop blocks 520 on the second oil passage 250. It should be noted that although the amount of oil entering the first oil passage 240 is relatively reduced, it is still greater than the amount entering the second oil passage 250. This ensures that more cooling oil is in the air gap between the stator disk 300 and the rotor disk 400, directly cooling the surfaces of the stator disk 300 and the rotor disk 400, thus guaranteeing the cooling effect. Furthermore, since the rotational speed of the shaft 200 is relatively low at this time, the viscous resistance and oil churning loss between the rotor disc 400 and the stator disc 300 are also relatively small, which will not affect the normal operation of the motor.

[0048] As the rotational speed of the shaft 200 increases, the heat generated by the rotor disk 400 increases, and the centrifugal force on the adjusting plate 510 and the adjusting shaft 511 also increases. The amount by which the adjusting shaft 511 moves away from the central axis of the shaft 200 gradually increases, which further increases the obstruction of the stop block 520 on the first oil passage 240 and reduces the obstruction of the stop block 520 on the second oil passage 250. This causes the amount of oil entering the first oil passage 240 to gradually decrease and the amount of oil entering the second oil passage 250 to gradually increase. Ultimately, the amount of oil entering the first oil passage 240 is less than the amount of oil entering the second oil passage 250. The cooling oil is then introduced into the third oil passage 410 of the rotor disk 400 through the second oil passage 250, directly cooling the inside of the rotor disk 400. This allows the shaft 200 to maintain heat dissipation at high speed while reducing the viscous resistance and oil churning loss between the rotor disk 400 and the stator disk 300, thus mitigating the impact on the motor's operating efficiency.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An internal and external heat dissipation type motor, characterized in that: The device includes a housing, a rotating shaft, multiple stator discs, and multiple rotor discs. The housing has heat sinks and an oil drain port. The rotating shaft is rotatably mounted on the housing and coaxial with it. The rotating shaft is hollow and has an oil inlet at one end. Multiple first oil groups and multiple second oil groups are sequentially arranged along the shaft's axis, alternating in the direction of the shaft's axis. Each first oil group includes multiple first oil passages, and each second oil group includes multiple second oil passages. All first and second oil passages are evenly distributed around the shaft's axis and are connected to the shaft. Multiple stator discs and multiple rotor discs are located between the rotating shaft and the housing and are coaxial with the shaft. The stator discs are mounted on the housing, and the rotor discs... Multiple stator disks and multiple rotor disks are arranged sequentially and alternately along the axis of the shaft within the housing. An air gap is defined between adjacent stator disks and rotor disks, and the first oil passage is connected to the air gap. Each rotor disk has multiple third oil passages arranged around its axis, and the third oil passages correspond one-to-one with the second oil passages, and the third oil passages are connected to their corresponding second oil passages. An adjusting component is provided between every two adjacent first and second oil passages along the axis of the shaft. The adjusting component can adjust the amount of oil entering the first and second oil passages according to the rotational speed of the shaft, so that the amount of oil entering the first oil passage is negatively correlated with the rotational speed of the shaft, and the amount of oil entering the second oil passage is positively correlated with the rotational speed of the shaft.

2. The internal and external heat dissipation motor according to claim 1, characterized in that: Multiple adjusting cylinders are evenly distributed around the axis of the rotating shaft. The adjusting cylinders are arranged along the axis of the rotating shaft and are sealed to the rotating shaft. Multiple adjusting components in the same axial direction are installed in the same adjusting cylinder, and each adjusting cylinder has a through hole for connecting to the first oil passage and the second oil passage respectively. The adjusting component includes an adjusting plate and two stops. The two stops are arranged sequentially in the axis of the rotating shaft and are slidably installed in the first oil passage and the second oil passage respectively. The two stops are connected by a connecting rod. The adjusting plate is arranged in the radial direction of the rotating shaft and inserted between the two stops. The adjusting plate can move relative to the two stops in the radial direction of the rotating shaft and can move synchronously with the two stops in the axis of the rotating shaft.

3. The internal and external heat dissipation motor according to claim 2, characterized in that: Each adjusting plate is equipped with an adjusting shaft, and the adjusting cylinder has multiple adjusting grooves. The adjusting grooves are inclined grooves and are arranged one-to-one with the adjusting shafts. The adjusting shaft is slidably installed in the corresponding adjusting groove through a first elastic element. The two ends of the adjusting groove in the direction of the rotating shaft axis are respectively called the first end and the second end. The first end is located on the side of the second end in the direction of the rotating shaft axis that is close to the first oil passage arranged adjacent to it, and the first end is located on the side of the second end in the direction of rotational radial direction that is far away from the central axis of the rotating shaft. In the initial state, the first elastic element causes the adjusting shaft to move closer to the second end of the corresponding adjusting groove.

4. The internal and external heat dissipation motor according to claim 3, characterized in that: The two stops can move closer to or further away from each other along the axis of rotation.

5. The internal and external heat dissipation motor according to claim 3, characterized in that: Multiple mounting slots are provided on the rotating shaft. The mounting slots are arranged along the radial direction of the rotating shaft and correspond one-to-one with the adjustment slots. Limiting blocks are provided in the mounting slots. The limiting blocks can pass through the mounting slots along the radial direction of the rotating shaft and extend into the adjustment cylinder. The limiting blocks are locked to the rotating shaft by bolts.

6. The internal and external heat dissipation motor according to claim 1, characterized in that: The rotating shaft has multiple first through holes and multiple second through holes. The first through holes are configured to correspond one-to-one with the first oil passages, and the first through holes are connected to the first oil passages corresponding to them. The second through holes are configured to correspond one-to-one with the second oil passages, and the second through holes are connected to the second oil passages corresponding to them.

7. The internal and external heat dissipation motor according to claim 1, characterized in that: Each rotor disk is provided with multiple first baffles and multiple second baffles, which are respectively disposed on two end faces of the rotor disk in the direction of the rotation axis. The multiple first baffles and multiple second baffles are arranged sequentially and alternately around the rotation axis. The two ends of the first baffles and second baffles in the direction of the rotation axis are respectively referred to as the head end and the tail end. In the rotation direction of the rotor disk, the head end is located behind the tail end, and in the radial direction of the rotation axis, the head end is located on the side of the tail end that is far away from the central axis of the rotation axis in the radial direction of the rotation axis. Both the first baffles and the second baffles have a first state and a second state. In the first state, both the first baffles and the second baffles extend into the air gap. In the second state, both the first baffles and the second baffles retract into the rotor disk. Initially, both the first baffles and the second baffles are in the first state.

8. The internal and external heat dissipation motor according to claim 7, characterized in that: Both the first baffle and the second baffle are inclined relative to the axis of rotation. An elastic block is provided on the rotor disk. The two end faces of the first baffle and the second baffle on the axis of rotation are respectively called the first end face and the second end face. The first end face is located on the side of the first baffle or the second baffle that is close to the air gap, and the first end face is inclined. In the initial state, the first end face is in the air gap. The second end face is located on the side of the first baffle or the second baffle that is close to the elastic block, and the second end face abuts against the elastic block.

9. A motor with internal and external heat dissipation according to claim 8, characterized in that: Both the first and second baffles are provided with trigger holes, which are set one-to-one with the third oil passages. Each trigger hole is located in the third oil passage corresponding to it. Each rotor disk has a trigger cylinder slidably installed in the third oil passage. The trigger cylinder is set along the radial direction of the rotating shaft, and the two ends of the trigger cylinder in the radial direction of the rotating shaft are connected. In the initial state, the trigger cylinder is located on the side of the first and second baffles close to the central axis of the rotating shaft in the radial direction of the rotating shaft, and the trigger hole and the corresponding third oil passage are connected but not coaxial. When the first and second baffles are retracted into the rotor disk, and the trigger cylinder slides along the radial direction of the rotating shaft away from the central axis of the rotating shaft and passes through the trigger hole, the trigger hole and the corresponding third oil passage are connected and coaxial.

10. A motor with internal and external heat dissipation according to claim 9, characterized in that: The trigger cylinder is a square cylinder with a sloping surface on its outer peripheral wall. The sloping surface is located on the side of the trigger cylinder closest to the elastic block.

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